echo.gno

 1// Package echo is gnotif's demo realm: Echo sends a message back to its
 2// caller as a browser notification.
 3package echo
 4
 5import (
 6	"chain"
 7
 8	"gno.land/r/g13rqvks880v0hmlfepcj0kkudq0js38d3pc5k6a/gnotif/v1"
 9)
10
11// This realm's gnotif identity opens its handle and sets its trigger at
12// deploy. It keeps no handle, so the trigger never changes.
13func init(cur realm) {
14	me := cur.Sub(gnotif.Subpath)
15	h := gnotif.Open(cross(me))
16	h.Set(cross(me), "echo", gnotif.Trigger{Event: "Echo", Param: "to", Title: "Echo", Body: "{msg}", Link: "/"})
17}
18
19// Echo sends msg to the browsers that opted in with the caller's address.
20// The recipient is always the caller, so nobody can notify another address.
21func Echo(cur realm, msg string) {
22	chain.Emit("Echo", "to", cur.Previous().Address().String(), "msg", msg)
23}
24
25// Render serves one page for every path: what Echo does and where to try it.
26func Render(_ string) string {
27	return "# Echo\n\n" +
28		"Call `Echo` with a message, and gnotif shows it as a notification in the browsers " +
29		"that turned on notifications for your own address. Nobody else can send one to you.\n\n" +
30		"Try it on [demo.gnotif.xyz](https://demo.gnotif.xyz).\n"
31}